// Copyright (C) 2004-2007 MySQL AB
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2 as published by
// the Free Software Foundation
//
// There are special exceptions to the terms and conditions of the GPL 
// as it is applied to this software. View the full text of the 
// exception in file EXCEPTIONS in the directory of this software 
// distribution.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 

using System;
using MySql.Data.Common;
using System.Collections;

namespace MySql.Data.MySqlClient
{
	/// <summary>
	/// Summary description for MySqlPoolManager.
	/// </summary>
	class MySqlPoolManager
	{
		private static Hashtable pools;

		static MySqlPoolManager()
		{
			pools = new Hashtable();
		}

		public static MySqlPool GetPool(MySqlConnectionString settings)
		{
			string text = settings.GetConnectionString(true);

			lock (pools.SyncRoot)
			{
				MySqlPool pool;
				if (!pools.Contains(text))
				{
					pool = new MySqlPool(settings);
					pools.Add(text, pool);
				}
				else
				{
					pool = (pools[text] as MySqlPool);
					pool.Settings = settings;
				}

				return pool;
			}
		}

		public static void RemoveConnection(Driver driver)
		{
			lock (pools.SyncRoot)
			{
				string key = driver.Settings.GetConnectionString(true);
				MySqlPool pool = (MySqlPool)pools[key];
				if (pool == null)
					throw new MySqlException("Pooling exception: Unable to find original pool for connection");
				pool.RemoveConnection(driver);
			}
		}

		public static void ReleaseConnection(Driver driver)
		{
			lock (pools.SyncRoot)
			{
				string key = driver.Settings.GetConnectionString(true);
				MySqlPool pool = (MySqlPool)pools[key];
				if (pool == null)
					throw new MySqlException("Pooling exception: Unable to find original pool for connection");
				pool.ReleaseConnection(driver);
			}
		}
	}
}
